Plow-beam



Patented Aug. 17,1880.

In v a n r? 0 r Cat]: arfn s 1 13a ckinyhdm By; J0? Jfiarney (No Modei.)

0. P. BUGKINGHAM.

Plow Beam.-

mfim m w.

N4 PEIERS, PHOTO-LITHOGRAPNE}; WASHINGTON. D. G.

UNITED STATES PATENT OFFICE.

OATHARINUS I. BUOKINGHAM, OF CHICAGO, ILLINOIS.

PLOW-BEAM.

SPECIFICATION formingpart of Letters Patent No. 231,147, dated August 1'7, 1880.

(N0 model.)

To all whom it may concern:

Be it known that I, OATHARINUS PUTNAM BUCKINGHAM, of the city of Chicago, county of Cook, and State of Illinois, have invented a new and useful Improvement in P10 w-Beams, of which the following is a specification.

My invention relates to plow-beams made of metal, particularly to those made of Bessemer steel.

My invention consists in the combination 0tan upper and a lower flange, an upper and a lower fillet, and a concavity between the fillets on each side of the plow-beam.

In the accompanying drawings, in which similar letters indicate like parts in both tigures, N indicates the plow-beam in general, and A O D, &c., indicate. various parts thereof, which will presently be described. M represents the clip in general, 0 being the front edge andp the back edge thereof.

object of the clip being to attach the beam to the plow, the method of doing which is well understood.

In Fig. 2, A A and A A are the flanges on the upper and lower sides of the beam. C O and G O are the upper and lower fillets, respectively, the upper fillets being immediately below the upper flanges, and the lower fillets being immediately above the lower flanges. The vertical surfaces of the fillets are in the same plane, thus forming a flat surface against which the clip can be placed and supported.

The object of my invention is to furnish a plow-beam with a flat surface against which a flat-faced clip can be placed and firmlybolted,

and at the same time preserve the qualities of strength and lightness.

The objects of the flanges A A and A A are, first, to give strength to the plow-beam where the strain is greatest, the tendency of the propelling and resisting forces being to straighten the beam out, producing the grer est strain at the top and bot-tom sides of the beam; and, second, by extending along and against the front and back edges of the clip, to hold the same firmly in its place and prevent its turning on the bolt which secures it to the beam.

The object of the fillets O (J O O is to furnish a flat surface against which the fiat-faced clip can be placed, rendering the beam interchangeable with other beams which are secured to the plow by means of flat-faced clips.

The object ot'theconcavities D D is tolighten the beam by removing the metal of the beam from that part where the strain is least.

In describing my invention 1 have applied it to both the vertical sides of the plow-beam, because the plow-beams will generally be so made. I do not confine myself to its application to both sides, but it may be applied to either side alone.

I do not claim the flanges A A A A, nor the concavities D D, nor a combination ofthem alone.

I claim- In a plow-beam, the combination of an upper and a lower flange, A A, an upper and a lower fillet, O O, and a concavity, D, between the fillets, substantially as shown, and for the purposes described.

0. P. BUOKINGHAM.

Witnesses:

J. H. TRUMAN, WM. BUCKINGHAM. 

